mobile photography is a relatively new term to describe using your phone (nokia, motorola, ericsson etc) to take photos while you are mobile, some sites such as t-mobilepictures.com let you have a link on the internet relating to those pictures so you can share them with your buddies.
not all mobile phone companies are compatible with this service and theres not much using using a mobile phone if you have less than about 1megapixel resolution in your mobile phones digital camera, however new mobile phones seem to have a much better camera quality, but you would have to check with your mobile phone

Here is a graph of the popularity of "mobile photography"

Always check to see if you can get free ringtones with your free t mobilepictures account